LU-16072 utils: snapshot support to foreign host

LU-16072 utils: snapshot support to foreign host

Currently <foreign> host field in /etc/ldev.conf is unused/ignored,
due to this <lctl snapshot_*> commands do not work when <local>
host is not accessible or if any of the targets are failed over to
<foreign> host. This patch addresses those cases where
<lctl snapshot_{create, destroy, mount, umount, list, modify}>
commands work when the targets are present in <foreign> host.

HPE-bug-id: LUS-10648
Test-Parameters: fstype=zfs testlist=sanity-lsnapshot
Signed-off-by: Akash B <akash-b@hpe.com>
Change-Id: I706c5e43755386eab4facd42ff7a127aa5c9254c
Reviewed-on: https://es-gerrit.dev.cray.com/160702
Tested-by: Alexander Lezhoev <alexander.lezhoev@hpe.com>
Tested-by: Siddarth Raj <siddarth.raj@hpe.com>
Reviewed-by: Dipak Ghosh <dipak.ghosh@hpe.com>
Reviewed-by: Alexander Boyko <alexander.boyko@hpe.com>
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/48226
Reviewed-by: Alexander <alexander.boyko@hpe.com>
Reviewed-by: Emoly Liu <emoly@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>